Have you ever wondered how so many new browsers — from Brave to Arc to even experimental AI browsers — seem to pop up, yet all feel as fast and compatible as Chrome?
The secret: Chromium.
Most modern browsers don’t build rendering engines from scratch. Instead, they rely on the open-source Chromium engine (the same one powering Google Chrome and Microsoft Edge) and build their own UI, features, and ecosystem on top.
In this post, I’ll break down how people create browsers on top of Chrome’s engine, what tools you can use, and even give you a minimal, runnable example
Common Ways to Build a Chromium-Based Browser
- Electron
- Bundles Chromium + Node.js.
- Ideal for JavaScript/TypeScript developers.
- Cross-platform but produces large app sizes.
- Popular for quick prototyping or custom desktop browsers.
- Chromium Embedded Framework (CEF)
- C/C++ wrapper around Chromium.
- Gives fine-grained control (tabs, network, native integration).
- Used in Steam, Spotify, and some real custom browsers.
- WebView2 (Windows)
- Embeds the Edge (Chromium) engine directly.
- Lightweight, but Windows-only.
- Great for corporate apps that need a webview-based shell.
- Qt WebEngine
- Qt bindings around Chromium.
- Perfect for C++/Qt apps with custom GUIs.
- Cross-platform with rich widget support.
- Building Chromium from Source
- The most powerful, but also the hardest path.
- Chromium’s codebase is massive and complex.
- Only worth it if you truly want to modify the rendering engine itself.
Tradeoffs You Should Know
- Binary Size & Memory:
Electron and CEF apps are large (tens of MBs). WebView2 is lighter since it uses Edge runtime. - Platform Coverage:
Electron and CEF are cross-platform. WebView2 = Windows only. Qt WebEngine = cross-platform if you already use Qt. - Control vs Complexity:
Electron is quick to start with.
CEF gives deep control but more boilerplate.
Chromium source = full control, but prepare for pain. - Licensing & Media Codecs:
Chromium is open source, but proprietary media codecs (like AAC, H.264) may need separate handling if you want YouTube/Netflix-level playback.
Minimal Example: A Tiny Electron Browser
Let’s start with something you can run today.
1. package.json
{
"name": "mini-browser",
"version": "0.1.0",
"main": "main.js",
"scripts": { "start": "electron ." },
"devDependencies": { "electron": "^26.0.0" }
}
2. main.js
const { app, BrowserWindow } = require('electron')
const path = require('path')
function createWindow() {
const win = new BrowserWindow({
width: 1200,
height: 800,
webPreferences: { preload: path.join(__dirname, 'preload.js') }
})
win.loadFile('ui/index.html')
}
app.whenReady().then(createWindow)
app.on('window-all-closed', () => app.quit())
3. ui/index.html
<!doctype html>
<input id="url" placeholder="https://example.com" style="width:90%">
<button id="go">Go</button>
<iframe id="page" style="width:100%; height:90vh; border:0"></iframe>
<script>
const url = document.getElementById('url')
document.getElementById('go').onclick = () => {
let u = url.value
if(!/^https?:\/\//.test(u)) u = 'https://' + u
document.getElementById('page').src = u
}
</script>
4. Run it 🚀
npm init -y
npm i --save-dev electron
npm start
That’s it! You’ve just built a barebones browser.
🔮 Next Steps
Now that you have a skeleton, you can add:
- Tabs, bookmarks, and history.
- A downloads manager.
- Developer tools (already bundled with Chromium).
- Custom privacy or AI features that make your browser unique.
For production, also review:
- Security: enable sandboxing, disable Node integration in renderer.
- Codecs: check video/audio support.
- Updates: build an auto-updater flow if you’re distributing your browser.
🌟 Conclusion
Building your own browser with the Chrome engine is no longer an impossible dream. Thanks to tools like Electron, CEF, and Qt WebEngine, you can start small and grow into a full-fledged browser project.
The key decision is:
👉 Do you want speed of development (Electron/Tauri)
👉 or deep control (CEF/Chromium source)?
Either way, you can create something unique that sits on top of Chromium’s battle-tested engine.
